18385776713 has 2 divisors, whose sum is σ = 18385776714. Its totient is φ = 18385776712.

The previous prime is 18385776679. The next prime is 18385776727. The reversal of 18385776713 is 31767758381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17849761609 + 536015104 = 133603^2 + 23152^2 .

It is an emirp because it is prime and its reverse (31767758381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18385776713 - 2⁶ = 18385776649 is a prime.

It is not a weakly prime, because it can be changed into another prime (18385776313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9192888356 + 9192888357.

It is an arithmetic number, because the mean of its divisors is an integer number (9192888357).

Almost surely, 2^18385776713 is an apocalyptic number.

It is an amenable number.

18385776713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18385776713 is an equidigital number, since it uses as much as digits as its factorization.

18385776713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5927040, while the sum is 56.

The spelling of 18385776713 in words is "eighteen billion, three hundred eighty-five million, seven hundred seventy-six thousand, seven hundred thirteen".